4'(ï¿½-hydroxyethoxy)chalconyl-3,5-diaminobenzoate and three kinds of aromatic dicarboxylic acids were used as monomers in a direct polycondensation reaction for synthesis of some polyamides containing chalconyl units in pendant groups. The presence of these units in the structure of...

Experiments were performed concerning the influence of soil organic matter on Cd availability to wheat seedlings. Cadmium added to soil was bound by alkali soluble humic substances through linkages so strong that it was not removable by seedlings under toxic limit. Cadmium linked by organic...

The present demand for a drastic reduction in environmental pollution is extended to qualitative change in the approach to development of biodegradable polymers. The aim of this article is to focus on the synthesis of biodegradable optically active poly(ester-imide)s (PEI)s, which compose of...

The article offers information on a new dyeing process for yarns and fabrics. It was constructed from the polyamide polycondensate of 4,4'-diaminodicyclohexylmethane with dodecanedioic acid. With the use of cationic dyes, solid, bright and flourescent shades were obtained and evaluated in...

The emission bands exchibited by films of polyimides derived from 1,3-bis(3,4-dicarboxyphenoxy)benzene dianhydride, hexafluoroisopropylidenedibenzene-3,3',4,4'-tetracarboxylic dianhydride, and aromatic and heteroaromatic diamines, and also of polyamides and polyquinazolones derived from the same...

New Non-linear Optical materials have been attracting much attention because of their potential applications in emerging opto-electronic technology. The dipolar nature of amino acid leads to peculiar physical and chemical properties, thus making an ideal candidate for NLO applications. The amino...

Single crystals of L- threonine (L-thr) were grown successfully by slow-evaporation technique. The as grown crystals were subjected to various characterization like powder XRD, FT-IR recordings. The structure of the crystal was confirmed by single crystal X-ray diffraction analysis. The...